Jean vilhelm skogllpsd



' orated at a moderate heat byjvery brief heatin g. The fat or the fatty acid which rema ns in the grain, besidesiserving as remover of the ether, diminishes the 'burningspeed or pletely evaporate allthe dissolving fluids, and;

IT D sures-Q,

JEAN VIL'HELM sxoeiuiunfoi sfroox noulu SPECIFICATION formingpart 6r was n w ne' ie'hosjoi Application ma June z2. a 91.'- stun 115.391.065- oio teams,

To all? whom it mag concern:-

-Be it known that I, JEAN VILHELM SKOG-J- LUND, a subject of the Kingof Sweden and' Norway, residing at- Stockholm, Sweden, have.

inventedan Improvementin Explosive Powder; of which the following is a specification- Theobject of thisiinve'ntiou is to produce a so-called smokeless powderfdr firearms,

' which for its explosive .qualities a 6. its eta- 1o hility is equal. r-superior 't o all ot er kindsof gunpowder, Thispowderjconsists, essentially, ofnitrates ofcellulose or gun-cotton.

It is well known that acetone, ethyl acetate,

and other kiudsof ether dissolvejorgelatinize gun-cotton but if said mass after grainiug and drying is exploded 'the explosion will be very incomplete and inefie ctive, because the. .kernels or the inner cores of thegrains and also 'whole grains remain unburned? This'r'e sults from the fact that it is impossible after the gun-cotton has been gelatiuated to com this very much diminishes its explosivepca pacity.

acidthere is wit 4 r burning will the powder'be. .'l he reason wh v In this present invention gun-cotton is used as a' base and asolventis used which will evaporate perfectly and just as easily-1nthe kernel or the innermost core of the grain as on its outer surface, so that exactly the same product is alwaysobtained at each,fabrica-' tiou instead of the result being. very capritcious and-uncertain, as hitherto. Y ,W hena fat or a'free fatty acid-suchas'palmitiueljor stearine-is dissolved in the.'solvent,'wh ch should be ethyl acetate or acetone or equiv:

aleut-such as ethyl formate and the gun'- cotton is gelatiuated with the fat"solution-um der certain precautionary ,Jtreatment, do} scribed below; and the mass thus produced l S grained, the: ethyl acetate, 856i, is easily evap velocity of explosion." .The more fat'orifat'ty the ether the more slowthe etheris so easily evaporated from the gelatine when-fatis dissolved .thereinis as follows: When the gun-cotto'n is gelat'iuatedor dissolved in the solution of-fat oniatt-y acid, both the gnu-cotton and the fatexist together inadissolvedstateand thoroug I s 4 Ifthen-the ether'is allowedlgto evaporate, the

gelatin-e is concentrated and-at, a certaiu point the solveutiis unable'to keep the-wholeof the .mass dissolved, as the fat,1which in this case; .isn ore inclined than theg'u'n-cottomto re: .main insoluble state-the.guu-cottonprecipitates. T isgoperation.isgcontinued until all the guu-cottou isprecipitated and the very" strongly-concentrated warm fatty solutionfre e e iiovem 2 ,1892! mixed; I I

mains which has no effect on the gun-cottou aud the remaining ether passesoff freely from it; Duly so much of the solution'is used as -is necessary-forobtaining what I-eali a com :ceutrated gelatiue. 'The quantity of. the

tether varies somewhat with the quantity of the fat dissolvedtherein. I z.

When gelatina'ting, the following facts areimportant to observe; :The mixture of the-s0 lution of fat or fatty acid and the gunrc'otton is made verytgently, withou t kneading, and

in suchpropo'rtiou's, or thereabout,as-statedJ. 1 below, andthemassthus prepared is pressed to obtain thefmost satisfactory gelatine. If,

on thecontrary', the. un-cotton is kneaded or workedve'ry hard into the solution of acetone or etherand the fat, agelatine-will be pro duced in which the fatty material [appears as if separatedduring suchworkiug and the said gelatineretains obstinately the ether and the f fat'has' no elfe'ct in the evaporating operatijoui When the explosion-ofthe finished. powder {takes place, the fat-remaining is either'volaatilized' or burned; but it is uot necessary .to

make the fat burn by 'adding-au-oxyg'enic factor, because the-fat. audthe products or' bodies generated therefrom 'i-n theexplosion will producean extremely small, amount of smoke; but saltpeter or. equivalent material maybe mixed with ,the other materials, when thePowder will bemore powerful, but there inert mat ter.1nay1be added to vary the color or speed of combustion, if desired.

The practical manner ofmanufacture is as, follows: The gun-cotton is preferably ground {will rbe-more smoke; -Lampblack or other I fine "and whenever desired saltp'eter is added.

The solvent which -I prefer is' ethyl acetate or acetoue,which' need not necessarily be chemiloo callyv pure, and "fat or fatty acid .is added in theproper proportions. Thejfatty acid-such .asstearic acid--v-is added to the-ethyl atetate or acetone and the gun-cottonz in"; about the proportion of eight parts fatty acid, ninety to one hundred parts ethyl acetate or acetone, and one hundred parts nitrated cellulose, and the materials are mixed thoroughly in a drum with a stirrer. Suflicient of the solvent is to housed in all cases to properly gelatinize the nitrated cellulose. This 'massis then pressed in order that the gelatinating may take place.-

and dried as usual. pressed after them more .solid and reduce the rate of combustion; v

I am aware that an oil has been employed with an explosive containing nitro-glycmine.

After this the gelatine is formed into grains These-grain's n ay bebeing dried,-which will make" ployed in my explosive. i

I, claim as my invention- 1.- The explosive material herein specified, consisting of dried grains of nit'rated cellulose gelatinized by means of a solvent containing a fat or fatty acid.

. 2, The explosive material herein specified, consistingof v gelatinized by means of a solvent containing a fator fatty acid and saltpeter. Signedhy me this 18th day of June, 1891.

' J EAN VILHELM SKOGLUN D. Witnesses: l

G no. T. PINCKNEY,

WILLIAM G. Mo'r'r.

On the contrary, no-nitro-glyeerine is em-- dried grains of nitrated cellulose 

